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Foldcore Structures with Origami Initiators for Energy-Absorbing Sandwich Panels

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Abstract

Origami foldcore structures can be used in thin-walled sandwich panels to provide unique advantages over traditional honeycomb structures. For instance, their continuously connected space is available for flowing through cooling liquid or compact pipeline placement. However, origami foldcores suffer from relatively low-energy absorption. This paper proposes a new design of energy-absorbing foldcore structures for sandwich panels, including the geometric design, experimental tests, numerical parametric study, and theoretical estimation of energy absorption. Origami initiators are introduced to the Miura foldcores to induce a failure mode with more transverse folds, which is not common for regular foldcore structures. As a result, 60% higher energy absorption and tunable load uniformity can be achieved.

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All data generated or analyzed during this study are included in this published article and the supplemented video: https://youtu.be/gQkQ2bZZjdc.

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Acknowledgements

Discussions with Qingyang Chen are acknowledged.

Funding

This project is funded by the National Natural Science Foundation of China (Grant No. 12202320) and the Guangdong Basic and Applied Basic Research Foundation (Grant No. 2021A1515110589).

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Authors and Affiliations

  1. The Institute of Technological Sciences, Wuhan University, Wuhan, 430072, China

    Jun Cheng & Yang Li

  2. Wuhan University Shenzhen Research Institute, Shenzhen, 518057, China

    Yang Li

Authors
  1. Jun Cheng
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  2. Yang Li
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Contributions

JC carried out the parametric design, numerical analysis, manufacturing prototypes, experiments, and the writing of the first draft. YL provided funding acquisition, research conceptualization, supervision, and paper editing. Both authors read and approved the final manuscript.

Corresponding author

Correspondence to Yang Li.

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Cheng, J., Li, Y. Foldcore Structures with Origami Initiators for Energy-Absorbing Sandwich Panels. Acta Mech. Solida Sin. 36, 491–505 (2023). https://doi.org/10.1007/s10338-023-00396-x

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  • DOI: https://doi.org/10.1007/s10338-023-00396-x

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